Malicious PDF — malware analysis report

Static analysis result for SHA-256 f49c032b994b1d9a…

MALICIOUS

PDF

68.6 KB Created: 2020-12-23 09:32:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f38c9776830c7c22e62cf1181ddcf5d1 SHA-1: 0acab362fd9bf79e808cc24144abb3e8ab331240 SHA-256: f49c032b994b1d9a4d46fc5ed826cafa23b58d15a38d2ddf19e288a680d55ef6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/aws?utm_term=architectural+drawing+pdf+free'. This URL is presented within the document body, suggesting a phishing attempt to trick the user into downloading further malware or visiting a malicious site. ClamAV also detected the file as Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0, reinforcing the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffmen.ru/aws?utm_term=architectural+drawing+pdf+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4444100/normal_5fa3d6f3b566c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459320/normal_5fd7bb23bb08b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486987/normal_5fabafba4a9ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379723/normal_5f9482fb307bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lodunixodetum/glencoe_advanced_mathematical_concepts_precalculus_with_applications_teachers_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3716de62-896f-4ec3-a956-86eaeede8279/guild_wars_2_leatherworking_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f585bd02-37fd-44cd-b012-5f0083a473a3/sojas_wagle_brown.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/lulupavuvutuvezoleloxo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe2b7310976247e79f9461b/t/5fe2d7f45c6c7c72e85859b9/1608701941649/although_however_despite_exercise.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe1a98d1562c21224f82247/t/5fe1bad4e77a3c5c7ee25dc8/1608628949198/global_handwashing_day_2017_narrative_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02fafeb7-8164-4e61-babd-620a08291e30/gemilidonatenixi.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/four_types_of_sentences_worksheet_answers.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21B 5320 bytes
SHA-256: 7bd95c585ba14c208d88fc77e49a3b7d0ea352e308f6c059d6cc3de44a01e07e
font_01_sfnt_off0000e441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE441 9784 bytes
SHA-256: 59addb7968b1d45fe7bf7a51b6e79a5419fd47ccffcb89c253ad7808bfd839b8

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